Definition Of Static Pull To Apply On Belts - Interpump Group SS71 Betriebs- Und Wartungsanleitung

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Dimensions (in mm)

Belt section as per

DIN 7753 part 1 and B.S. 3790

Belt section as per

DIN 2215 and B.S. 3790

Pitch width

Increased grooving width b

Distance between grooving

Increased grooving depth

34°

by primitive diameter

narrow-section V-belts

38°

DIN 7753 part 1

34°

by primitive diameter

classic section V-belts

38°

DIN 2215

Tolerance for α = 34°-38°

Pulleys for b2 by grooving number z

b2 = (z-1) e + 2 f

Minimum pulley diameter must be respected.

Do not use laminated V-belts.

b) Use high performance belts – for example XPB instead of

SPB – as a lower quantity of belts for the same transmitted

power may be necessary and a consequent shorter

resulting distance compared to the shaft shoulder (P.T.O)

"a" of Fig. 11.

c) Pull the belts according to manufacturer instructions.

Excessive pulling can cause reduced bearing life and wear

out the pulley prematurely. Pulling depends on different

variables as indicated in par. 9.12.

d) Belt length has a natural tolerance ≥ ± 0.75%. For this

reason, the 4 belts must be purchased as a pair.

e) Follow the direction of the belt pull as shown in Fig. 11 for

other needs, contact our Technical or Customer Service

Departments.

f ) Take care of the alignment of the driving pulley and driven

pulley grooves.

DIN symbol

symbol B.S./ISO

DIN symbol

symbol B.S./ISO

α = 34°

≈

α = 38°

9.12